Lowrise Panties - Splurge or Steal?

Can you tell the splurge from the steal? Both pairs of panties above feature a modern low rise and are made of stretch nylon lace. Here are the manufacturers specs of the panties on the left:

"Ultra-comfortable, in a sheer, stretch lace. In a modernized, thong silhouette this sleek panty features a curved waistband and minimal coverage back panel.
- Modern, low rise thong
- Silky, sheer, stretch lace
- Flat, curved waistband
- Thong back is 1.5 inches at most narrow point
- Daringly low, 3.5 inch rise"

And the panties on the right:

"Beautiful and feminine, this thong has it all. All-over lace combined with ultra soft mesh and no side seams make this panty both pretty and comfortable enough to wear every day.
- All-over lace combined with ultra soft mesh
- Ultra-low silhouette with no side seams to add bulk
- Lace has great stretch and is ultra-soft
- Comfortable enough to wear every day"

The biggest difference in these panties is the price. One retails for $3.96 and the other retails for $18.00. Can you tell which thong is more expensive and why?